Alloy



Patented June 13, 1939 ALLOY Alpine R. MacGregor, Forest Hills, Pa.

No Drawing. Application December 2, 1937,

Serial No. 177,821

tage is the very fine crystal structure, which seems to be peculiar to alloys of this system having silver contents between 1 and 3 per cent. With lower and higher silver contents the crystal 1 Claim.

relates to welding, brazing or This invention alloys useful therefor. It resoldermg and to been made heretoproperties of copper for While the best results are obtained when the specifically to produce imsilver content is between 1 and 3 per cent and 10 proved copper-base rods and wire for use in weldthe phosphorus content is between 7 and 8.5 per ing, soldering, and like operations. For this purcentand preferably between 7.5 and 8 per pose it has been proposed to add varying amounts cent-a wider range of phosphorus contents proof phosphorus to the copper. It has also been duces useful results. For example, phosphorus proposed to add both silver and phosphorus to contents as high as 9 per cent and as low as 6 15 or even 5 per cent, with silver contents of 1 to compared with alloys having the preferred composition.

All of the alloys within the stated composition sive.

coarse structure, dition, which impairs its utility for cations.

alloys of the above stated composition can be used with good results in joining substantially all of the commercially useful metals, as well as for brazing and filling.

My invention has been described hereinabove 40 with special reference to certain practices and embodiments which are now considered advantageous,but may be otherwise embodied and practiced within the scope of'the appended claim.

7 to 8.5 per cent, with the balance substantially copper. An especially desirable composition contains about 2 per cent silver and 7.5 or 8 per cent phosphorus. Such compositions are easily made up and cast, and easily I claim: rolled from east bars, etc., into the form of An alloy comprising 7 to 8.5 per cent phossmall rods or strips or wire. phorus, 1 to 3 per cent silver, and the balance A d t t adv a e e u s f om he high substantially all copper amounting to 88 to 92 fluidity of my new alloy at relatively low temper cent, said alloy being characterized by high De u e It ay b read y demonstrated that fluidity at temperatures near its melting point so the fluidity of this alloy is higher, and its meltand by fine crystal structure and light color 1n ing point or temperature of application lower, the as-cast condition.

than with previously proposed silver-phosphoruscopper alloys for this purpose. Another advan- ALPINE R. MACGREGOR. 

